Combined door knob and lock



(No Model.)

E. WHITTINGHAM.

OOMBINED DOOR KNOB AND LOCK.

Patented July 5, 1887.

V v wi bmaooc a Q 5 no I 1 1'0:

315 utlo'zncl UNITED STATES PATENT EEicE.

ERNEST WHITTINGHAM, OF DETROIT, MICHIGAN.

COMBINED DOOR KNOB AND LOCK.

SPECIFICATION forming part of LettersrPatent No. 365,891, dated July 5,1887.

Application filed May 14, 1857. Serial No. 238,246. (No model.)

To all whom it may concern:

Be it known that I, ERNEsr WI-IITTINGHAM, of Detroit, in the county of\Vayne and State of Michigan, have invented new and useful Improvementsin a Combined Door Knob and Look; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings,which form apart of thisspecification.

This invention relates to new and useful improvements in a combined doorknob and lock; and the invention consists in providing the rose on theoutside of the door with an outwardly-projecting stud arranged to engagein a segmental slot of the door-knob, while said knob is provided with amovable shutter or tumbler located within the same and operated by asuitable key,by means of which said sh utter may be withdrawn orprojected to interfere or not, as desired, with the stud, all as morefully hereinafter described.

In the drawings which accompany this specification, Figure l is an edgeview of a door to which my improved door knob and lock are applied. Fig.2 is a detached perspective view of the locking-knob,showing the shutterin its locking position. Fig. 3 is a similar view with the shutterunlocked, and Fig. 4 is a plan.

A is a door-lock of any desired description, such as are used andoperated in connection with door-knobs.

B is the rose on the outside of the door. It is of ordinaryconstruction, except that it is provided with an outwardly-projectingstud,G.

. D isa door-knob of ordinary description and operation, except that itis made hollow and forms the case of a lock inclosed therein.

This lock may be of any suitable description, and is operated by a keythrough a keyhole in the outer face of the doorknob. In-

stead of the ordinary boulder-latch,this key is made to operate amovable sh utter,E,secured within the door-knob in the rear ofasegmental slot, F, cut through the rear face of the doorknob.

In practice, the parts being constructed and arranged as described, thestud O on the rose engages in the segmental slot F, which latter is ofsufficient length to permit the doorknob to turn freely the full amountrequired to operate the door-latch. Should it be required, however, tolock the door from the outside, the key in the knob is turned to projectthe shutter across the slot F, as shown in Fig. 2, when the stud Oprevents the knob from being turned.

It is clear that a device of this kind may be applied to any kind ofdoor-lock.

To permit the opening of the door from the inside, the latch of the doormust be provided with a thumb-piece, G, while the inner doorknob may bedispensed with.

What I claim as my invention is- 1. The combination, wit-h a lock andthe knob, of a ro'seprovided with aprojection extending into said knob,and'a locking device for said stud carried by said knob, substantiallyas described.

2. The combination, with a door-knob having in its rear face a segmentalslot, a movable shutter or tumbler secured within said knob and operatedby a key inserted in said knob, of a stud projecting into said slot,whereby when the shutter is brought in contact with said stud the knobis prevented from being turned, substantially as set forth.

ERNEST WHITTINGHAM.

WVitnesses:

A. BARTHEL, J. PAUL MAYER.

